commonly used in Toyota, Lexus, Honda, Acura, Bmw, Mercedes-benz, VW, Audi, Kia, Mini cooper and others that use 3/4 reach washer seat spark plugs. M14x1.25 spark plug repair kit. Extra insets Search item B00I9D3T8U for 3/4 reach washer seat. M14x1.25 spark plug repair tooling Extended: For applications that require deeper reach into the head. The 4412E tooling works very well in holes 6" deep or more. The installation is exactly the same for taper seat or washer seat you only need the appropriate length/style of insert. FIRST TIME REPAIRS ONLY. NOTE: Some early domestic vehicles use this also.